B. madagascariensis is known as an aggressive invader of disturbed areas in Hawaii, especially at low to mid elevations including open range, stream beds, and gulches (Hawaii Invasive Species, 2010). Also invades mesic to humic forests in Hawaii (Motooka et al., 2003; in PIER, 2008), becoming naturalised in mesic areas between 900 and 1200 m above sea level (Wagner et al., 1999; in PIER, 2008). In New Zealand, it occurs on sand dunes and coastal cliffs (Webb et al., 1988; in PIER, 2008).
Principal source:
Compiler: IUCN SSC Invasive Species Specialist Group (ISSG) with support from the Overseas Territories Environmental Programme (OTEP) project XOT603, a joint project with the Cayman Islands Government - Department of Environment
Review:
Publication date: 2010-06-01
Recommended citation: Global Invasive Species Database (2024) Species profile: Buddleja madagascariensis. Downloaded from http://www.iucngisd.org/gisd/species.php?sc=1577 on 02-11-2024.
B. madagascariensis can cause throat allergies in some people (FloraBase, 2010) and when dry, a powdery dust can emerge which may cause coughing, nose swelling and eyelid blisters (Hawaii Early Detection Network, 2010). The milky white sap can also cause burning rashes and blisters (Hawaii Early Detection Network, 2010).
B. madagascariensis has had an economic impact on ranchers in Australia, as it has a toxic effect on cattle and horses and must be kept away at the rancher's expense (Hawaii Early Detection Network, 2010).
Chemical: \"Katie Cassel of the Kōke‘e Natural History Museum (Kōke‘e Museum) reported good control of stems < 3 inches diameter with triclopyr ester at 20% in crop oil applied to basal bark and to larger stems that were frilled\" (Motooka et al., 2003; in PIER, 2008). FloraBase (2010) suggests that for stems greater than 7 cm diameter, apply 250 ml Access® in 15 L of diesel to basal 50 cm of stem (basal bark) or cut and paint with 50% glyphosate.
Physical: Smaller plants (< 7 cm diameter) can be hand pulled, making sure to remove all stem material (FloraBase, 2010).